Homology of Ti α-subunit of a T-cell antigen-MHC receptor with immunoglobulin

M. Fabbi, O. Acuto, J. E. Smart, E. L. Reinherz

Research output: Contribution to journalArticle

Abstract

Human T-cell receptors for antigen and major histocompatibility complex (MHC) determinants have now been defined on inducer, suppressor, and class 1 and class 2 MHC-specific cytotoxic T lymphocytes as T3-associated clonotypic molecules (Ti) of relative molecular mass 90,000 (90K) composed of one 49-54K α- and one 43K β-subunit which are disulphide-linked. In the case of the Ti β-subunit, N-terminal amino acid sequencing and molecular cloning techniques led recently to identification of the Ti β-gene and showed that T-specific V, D, J and C segments fuse to form an active β-gene. So far, however, there have been little structural data available on the Ti α-subunit. Here we have derived the amino acid sequence of a portion of the Ti α-subunit by CNBr fragmentation. Sequence analysis reveals ~40% homology between the Ti α-subunit fragment and the third framework of the variable region of immunoglobulin light and heavy chains, supporting the notion that the Ti α-subunit is a member of the immunoglobulin-Ti β-gene family.

Original languageEnglish
Pages (from-to)269-271
Number of pages3
JournalNature
Volume312
Issue number5991
Publication statusPublished - 1984

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Viral Tumor Antigens
Major Histocompatibility Complex
Immunoglobulins
T-Lymphocytes
Immunoglobulin Light Chains
Dilatation and Curettage
Immunoglobulin Heavy Chains
Immunoglobulin Genes
Protein Sequence Analysis
Molecular Cloning
Cytotoxic T-Lymphocytes
T-Cell Antigen Receptor
Disulfides
Genes
Sequence Analysis
Amino Acid Sequence

ASJC Scopus subject areas

  • General

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Fabbi, M., Acuto, O., Smart, J. E., & Reinherz, E. L. (1984). Homology of Ti α-subunit of a T-cell antigen-MHC receptor with immunoglobulin. Nature, 312(5991), 269-271.

Homology of Ti α-subunit of a T-cell antigen-MHC receptor with immunoglobulin. / Fabbi, M.; Acuto, O.; Smart, J. E.; Reinherz, E. L.

In: Nature, Vol. 312, No. 5991, 1984, p. 269-271.

Research output: Contribution to journalArticle

Fabbi, M, Acuto, O, Smart, JE & Reinherz, EL 1984, 'Homology of Ti α-subunit of a T-cell antigen-MHC receptor with immunoglobulin', Nature, vol. 312, no. 5991, pp. 269-271.
Fabbi M, Acuto O, Smart JE, Reinherz EL. Homology of Ti α-subunit of a T-cell antigen-MHC receptor with immunoglobulin. Nature. 1984;312(5991):269-271.
Fabbi, M. ; Acuto, O. ; Smart, J. E. ; Reinherz, E. L. / Homology of Ti α-subunit of a T-cell antigen-MHC receptor with immunoglobulin. In: Nature. 1984 ; Vol. 312, No. 5991. pp. 269-271.
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abstract = "Human T-cell receptors for antigen and major histocompatibility complex (MHC) determinants have now been defined on inducer, suppressor, and class 1 and class 2 MHC-specific cytotoxic T lymphocytes as T3-associated clonotypic molecules (Ti) of relative molecular mass 90,000 (90K) composed of one 49-54K α- and one 43K β-subunit which are disulphide-linked. In the case of the Ti β-subunit, N-terminal amino acid sequencing and molecular cloning techniques led recently to identification of the Ti β-gene and showed that T-specific V, D, J and C segments fuse to form an active β-gene. So far, however, there have been little structural data available on the Ti α-subunit. Here we have derived the amino acid sequence of a portion of the Ti α-subunit by CNBr fragmentation. Sequence analysis reveals ~40{\%} homology between the Ti α-subunit fragment and the third framework of the variable region of immunoglobulin light and heavy chains, supporting the notion that the Ti α-subunit is a member of the immunoglobulin-Ti β-gene family.",
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AB - Human T-cell receptors for antigen and major histocompatibility complex (MHC) determinants have now been defined on inducer, suppressor, and class 1 and class 2 MHC-specific cytotoxic T lymphocytes as T3-associated clonotypic molecules (Ti) of relative molecular mass 90,000 (90K) composed of one 49-54K α- and one 43K β-subunit which are disulphide-linked. In the case of the Ti β-subunit, N-terminal amino acid sequencing and molecular cloning techniques led recently to identification of the Ti β-gene and showed that T-specific V, D, J and C segments fuse to form an active β-gene. So far, however, there have been little structural data available on the Ti α-subunit. Here we have derived the amino acid sequence of a portion of the Ti α-subunit by CNBr fragmentation. Sequence analysis reveals ~40% homology between the Ti α-subunit fragment and the third framework of the variable region of immunoglobulin light and heavy chains, supporting the notion that the Ti α-subunit is a member of the immunoglobulin-Ti β-gene family.

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